Machine



(No Model.) 3 Sneak-Sheet 1.

R. BURGESS.

ENGRAVING MACHINE.

Y Patented July 7, 1885.

Maw: i e 16. 73 1;

3 Sheets-Sheet 2.

(NoModeL) RBURGESS.

ENGRAVING MACHINE Patented July 7,1885,

(No Model.) 3 Sheets-Sheet 3.

R. BURGESS.

ENGRAVING MACHINE.

No. 321,482. Patented July 7, 1885.

NITED STATES PATENT emcee ROBERT BURGESS, OF PASSAIO, NEW JERSEY, ASSIGNOR OF ONE-HALF TO J. F. REINHARD, OF SAME PLACE.

ENGRAVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 321,482, dated July 7, 1885.

Application filed July 28, 1884, (No model.) I

To azZZ 1071,0722 it may concern:

Be it known that I, ROBERT BURGESS, a subject of the Queen of GreatBritain, (having declared my intention to become a citizen of the United States) residing in Passaic, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Engraving-Machines, of which the following is a specification.

[0 My invention relates to that class of engravingmachines in which motion imparted to the tracer is transmitted through a series of pan tograplrlevers to mechanism carrying one or more cutting-points or gravers by which the design is correspondingly reproduced simultaneously upon the object to be engraved, provision being made for the relative adjustment of the parts in such manner as to vary the size of the engraving as compared with that of the design, as may be required.

I am aware that in this class of machinery the engraving-tools have been mounted upon a transversely-moving slide or carriage,while the article to be engraved has been mounted 2 5 so as to move at right angles thereto, the combined and simultaneous movements of the gravers and the article being engraved reproducing the curved port-ions of the design and I do not seek to cover this principle of construction, broadly.

Heretoforc this class of machinery has been used more especially for the reproduction of designs upon rollers or cylindrical surfaces, which are made to revolve in a fixed position under the engraving-points, and no adequate provision has heretofore been made for practically utilizing this class of machinery for engraving upon fiat surface.

While my improvements are especially de signed to adapt the apparatus to the engraving of flat plates and surlaces, they do not interfere with, but at the same time are equally adapted to facilitate, the engraving upon cylindrical surfaces.

It is also my object to simplify and cheapen the construction of the apparatus while rendering it more delicate and accurate in use.

Heretofore much difficulty and delay has been experienced in registering the cuttingpoints with relation to the work. I design to expedite this operation by, and one feature of my invention consists in,t-he special construction and arrangement of an adjustablefulcrum for the pantograph, at which point a very slight adjustment will bring the tracer-point and the engraving-point into harmony with each other.

Another feature of my invention consistsin the special construction and arrangement of a work table or platen mounted upon a bridge or carriage having a rectilinear motion at right angles to the rectilinear motion of thetool-carrier, which latter is mounted upon stationary ways upon the frame above, both the carriages being connected with and operated by a panto- 6 5 graph underneath, so that their combined mo tions will cause the cutting-points to describe irregular or curved lines upon either a flat plate or a cylindrical surface resting upon the work table or platen. In the case of the flat plate it is secured to the face of an adj ust-able backing or receiving surface upon the table, while in the cases of cylinders their ends are held in position under the cutting-points by stationary holders upon the frame, which al- 7 low them to rest upon the surface of the table and to be revolved by the latter as it reciprocates.

My invent-ion also includes operating the graver-carriage by means of. a transversely 8c reciprocating slide connected with the pantograph mounted between. suit-able ways upon the work-carriage, and having a connectionrod projecting at right angles to its line of motiomwhich engages with and passes through 83 a sleeve pendent from the graver-carriage, so that the reciprocal movements of the workcarriage, owing to the sliding of the rod in the sleeve,will not affect the graver-carriage, while any lateral movement of the reciprocating 9c slide will be immediate] y imparted to the gravercarriage whether the work-carriage is in motion or not. By this means a single direct connection of the pantograph with the work-carriage is made to operate both the 9 5 carriages with very slight friction.

An incidental feature of my invention in this connection consists in connecting the pantograph to the slide in the work-carriage by a reversible link, by which means the scope of I00 adjustment for varying the relative sizes between the design and engraving is largely increased.

In the accompanying drawings, Figure 1 is a 5 side elevation of an engraving-machine embodying my improved construction; Fig. 2, a front elevation of the same, the pantograph and engraving-tools being omitted; Fig. 3, a sectionalelevation of the machine without the gravers; Fig. 4, a plan of the adjustable pantograph-fulcrum.

Upon the table T of the machine are secured rails 16 at suitable distances apart sufficient to afford scope for the operation of the pantograph P between them.' The .pantograph, carrying-the tracer p, is of ordinary construction, excepting that its fulcrum F" rests in a plate, f, which is adjustable upon thetable T of the machine. This adjustment may be effected in a variety of ways, and the parts maybe .arranged so as to permit of the adjustment of the fulcrum in any or all directions. In the drawings the fulcrum-plate F is shown as resting in the grooved plate f, its position upon which is regulated by the adjusting-screws f f, and secured by the set- ,screws f f passing through the longitudinal slots f. The fulcrum-piece F is formed upon its upper side with a horizontally-grooved o arm, as shown, for the reception of the appropriate limb of the pantograph above, to which it is secured by a screw and nut in the same manner asthe reversible link L, described below. The appropriate arm or lever of the pantograph is connected with the actuating slide S by means of an elbow or link, L,which is grooved upon its under side, so as to straddle the lever, to which it issecured by a nut,

Z, engaging with the screw Z", which rests in the usual longitudinal slot in the lever. The other extremity of the link L is secured to the lugs of the slide S by a screw, 8, which allows the link to adapt itself to the movements of the pantograph. Owing to the shape of the 5 link L, it is obvious that by reversing its position upon the lever to the opposite or forward side of the lug s from the position shown in the drawings the degree of adjustment between the parts (for regulating the relative sizes of the design and the engraving) may be extended even beyond the joint 0 at the rear. Upon the rails it rest flanged rollers R R, sufficient in number to afford proper support for longitudinal beams B B, between and by which the work-table W is sustained. The beams B B are secured together by the bridge-plate B, which is formed with the longitudinal slot 1), in which rests the slide S. The work table or platen W is supported by 6 a standards 10 w a sufficient distance above the bridge-plate B to afford space between for the transverse slide or graver-carriage driver D,- which carries the connectiourod d, by which the transverse motion is imparted through the pendent sleeve 9 to the gravercarriage G. The slide D is sustained upon the rollers d d which rest upon the edges of the transverse slot 1). The slide S is secured to and suspended from the slide D, so that they practically constitute asingle device supported by and free to move upon the rollers d d.

In order to make the slide S fit snugly within the slot 12, and thus avoid undue play or 'looseness, I provide one side of the said slide in the stem 9, as shown in Fig. 3. This construction allows the sleeve g to accurately adapt itself to the driving-rod d, and tends to render the device more smooth and perfect in action.

Attached to the graver-carrier G, and pro jecting over the positionof the work-plate, are a suitable number of the usual engravingtools, as indicated in Fig. 1, which are operated in the usual manner. As there is nothing new about this portion of the apparatus the gravers, &c., are omitted from the grave r carriage G in the other views. For a like ,reason, the stationary holders for the ends of the cylinder 0, in Fig. 1, are omitted, the operation of engraving upon the periphery of a.

cylinder, 0, being the same as heretofore, except that in this case the cylinder-O rests upon and is rotated upon its axis by the upper flat surface of the work-table W.

Where the engraving is to be made upon a flat plate or surface I prefer to use an adjustable bed or backing, w, for the reception of the plate, the said bed-piece 10 being secured to the work table or platen by set-screws ww passing through elongated slots 10 20, (shown in Fig. 3,) which permit of the adjustment of the plate under the graver-points within certain limits, the final or more delicate adjustment of the work to the gravers being accomplished, if necessary, by adjusting the position of the pantograph-fulcrum, as heretofore mentioned.

The action of the apparatus will be readily understood, the work-plate in action reciprocating back and forth under the gravers to correspond with the advance and retraction of the tracer while the transverse motion of the tracer is in like manner appropriated by the graver-carriage.

The action of the pointer in following curved or irregular lines sets both the work-carriage and the graver-carriage in motion, the two rectangular movements blending together to reproduce the curve or irregularity upon the plate.

'What I claim as my invention, and desire to secure by Letters Patent, is-

1. In an engraving-machine substantially such as designated, the adjustable fulcrumplate formed with a fulerum-soclret and elongated slots f f, and provided with the setscrews f for securing it in position, substan tially as set forth, in combination with the pantograph, arranged to actuate the work and graver-carriages, substantially in the manner and for the purpose described.

2. In an engraving-machine substantially such as designated, the adjustable fulcrumplat-e formed with the fulcrumsocket and resting in grooved ways, and provided with the adj usting-screws f f substantially as set forth, in combination with the pantograph, arranged to actuate the work and graver carriages, substantially in the manner and for the purpose described.

3. In an engraving -machine substantially such as designated, the fulcrum-link or elbow formed with the fulcrum-pin upon its under side, and with the horizontal grooved limb for the reception of the pantograph-lever, substantially as set forth, in combination with the adjustable fulcrum-plate and the pantograph and engraving mechanism actuated thereby, substantially in the manner and for the purpose described.

4. In an engraving-machine substantially such as designated, a connecting-link for uniting the pantograph with the slides which actuate the work and grave-r carriages, which is so formed and secured to a lever of the pantograph that it may be reversed thereon, substantially in the manner and for the purpose described.

5. In an engraving-machine substantially such as described, the broad horizontal work plate or platen IV, mounted upon the reciprocating bridgeplate B, which is also provided with transversely-reciprocating slide S, at tached to the pantograph below and to the graver'carriage above, in combination with the gravcr-carriage mounted upon suitable transverse ways above the path of the said work-platen W, the whole being arranged and operating, substantially as described, to adapt the apparatus to engrave upon either flat or cylindrical surfaces, in the manner set forth.

6. In an engraving-machine substantially such as designated, the combination, withthe work-table, graver-carriage, and pantograph, of the slide S, situated between transverse ways formed in the supporting-frame of the said horizontal work-table and connected with the pantograph below and the graver-carriage above, substantially in the manner and for the purpose described.

7. In an engraving-n1achine substantially such as described, the slide S, which connects thehorizontal work-table and gravercarriage with the pantograph, substantiallyas described, provided with an adjusting device for fitting it according to the transverse way in which it travels, substantially in the manner and for the purpose described. A

8. In an engravingmachine substantially such as described, the combination and arrangement of the slide S, carriage D, and rollers d (2 supported between suitable ways in the frame of the work-table and connected with the pantograph and'the graver-carriage, substantially in the manner andfor the purpose described.

9. In an engraving-machine substantially such as designated, the graver-carriage capable of rectilinear motion at right angles to the motion of the work-table, provided with the pendent sleeve for engagement with the connecting rod secured to the transverse slide, which is actuated by the pantograph, thesaid parts being combined and arranged for the purpose and substantially in the manner described.

10. In an engraving -n1achine substantially such as designated, the combination of a graver-carriage and a work-carriage, arranged to reciprocate at right angles with relation to each other for the purpose and substantially in the manner described, with a pantograph connected therewith and actuating the said carriages either independently or simultaneously, substantially as described.

, ROBERT BURGESS. lVitnesses:

WM. GARDNER, Geo. W. .MIATT. 

